package www.com.library.util;

import android.content.Context;
import android.os.Environment;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;


/**
 * @author  hubble
 */

public class FileUtil {
    public final static String EXTERNAL_DIR = "GTS2_HX_WP";
    public final static String ID_CARD_Z = "idCardZ.jpg";
    public final static String ID_CARD_F = "idCardF.jpg";
    public final static String BankCard = "bankCard.jpg";

    // 创建内部文件
    public static File createInternalFile(Context context, String name) {
            return new File(Environment.getExternalStorageDirectory(), name);
    }

    // 创建外部文件
    public static File createExternalFile(Context context, String name) {
        return new File(context.getExternalFilesDir(null), name);
    }


    // 获取外部文件目录
    public static File getExternalDir(Context context) {
        return context.getExternalFilesDir(null);
    }

    // SD卡是否可用
    public static boolean isSDcardAvailable() {
        return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
    }



    // 获取文件大小
    //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据
    //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据
    public static long getFolderSize(File file){
        long size = 0;
        try {
            File[] fileList = file.listFiles();
            for (int i = 0; i < fileList.length; i++) {
                // 如果下面还有文件
                if (fileList[i].isDirectory()) {
                    size = size + getFolderSize(fileList[i]);
                } else {
                    size = size + fileList[i].length();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }

    /**
     * 格式化单位
     * @param size
     * @return
     */
    public static String getFormatSize(double size) {
        double kiloByte = size / 1024;
        if (kiloByte < 1) {
//            return size + "Byte";
            return "0K";
        }

        double megaByte = kiloByte / 1024;
        if (megaByte < 1) {
            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
            return result1.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "K";
        }

        double gigaByte = megaByte / 1024;
        if (gigaByte < 1) {
            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
            return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "M";
        }

        double teraBytes = gigaByte / 1024;
        if (teraBytes < 1) {
            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
            return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "GB";
        }
        BigDecimal result4 = new BigDecimal(teraBytes);
        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
                + "TB";
    }


    public static boolean deleteDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            String[] children = dir.list();
            for (int i = 0; i < children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
        }
        return dir.delete();
    }


    /**
     * 读取Assets目录下面指定文件并返回String数据
     * @param context
     * @param fileName
     * @return
     */
    public static String getJsonDataFromAssets(Context context, String fileName) {
        StringBuilder stringBuilder = new StringBuilder();
        InputStream inputStream = null;
        try {
           inputStream  = context.getAssets().open(fileName);
            byte[] buffer = new byte[inputStream.available()];
            inputStream.read(buffer);
            String json = new String(buffer, "utf-8");
            stringBuilder = stringBuilder.append(json);
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        finally {
            try {
                if(inputStream != null) {
                    inputStream.close();
                }

            }
            catch (IOException e) {
                e.printStackTrace();
            }
        }
        return stringBuilder.toString();
    }
}
